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fix: use placeholder dht/pubsub (#1193)

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Instead of making the `.dht` and `.pubsub` properties optional, use dummy implementations that throw exceptions if they are not configured.

This way we don't have to null guard everywhere they are accessed.
This commit is contained in:
Alex Potsides
2022-04-21 15:46:06 +01:00
committed by GitHub
parent 147304449e
commit 5397137c65
14 changed files with 186 additions and 78 deletions
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9
examples/pubsub/message-filtering/1.js
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@ -4,10 +4,9 @@ import { createLibp2p } from 'libp2p'
import { TCP } from '@libp2p/tcp'
import { Mplex } from '@libp2p/mplex'
import { Noise } from '@chainsafe/libp2p-noise'
import { Gossipsub } from '@achingbrain/libp2p-gossipsub'
import { FloodSub } from '@libp2p/floodsub'
import { fromString as uint8ArrayFromString } from 'uint8arrays/from-string'
import { toString as uint8ArrayToString } from 'uint8arrays/to-string'
import { CustomEvent } from '@libp2p/interfaces'
const createNode = async () => {
const node = await createLibp2p({
@ -17,7 +16,7 @@ const createNode = async () => {
transports: [new TCP()],
streamMuxers: [new Mplex()],
connectionEncryption: [new Noise()],
pubsub: new Gossipsub()
pubsub: new FloodSub()
})
await node.start()
@ -45,7 +44,7 @@ const createNode = async () => {
// Will not receive own published messages by default
console.log(`node1 received: ${uint8ArrayToString(evt.detail.data)}`)
})
await node1.pubsub.subscribe(topic)
node1.pubsub.subscribe(topic)
node2.pubsub.addEventListener(topic, (evt) => {
console.log(`node2 received: ${uint8ArrayToString(evt.detail.data)}`)
@ -75,7 +74,7 @@ const createNode = async () => {
// car is not a fruit !
setInterval(() => {
console.log('############## fruit ' + myFruits[count] + ' ##############')
node1.pubsub.dispatchEvent(new CustomEvent<Uint8Array>(topic, { detail: uint8ArrayFromString(myFruits[count]) }))
node1.pubsub.publish(topic, uint8ArrayFromString(myFruits[count]))
count++
if (count == myFruits.length) {
count = 0